Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in C:\xampp\htdocs\iglooapp\vendor\league\oauth1-client\tests\PlainTextSignatureTest.php:25 Stack trace: #0 {main} thrown in C:\xampp\htdocs\iglooapp\vendor\league\oauth1-client\tests\PlainTextSignatureTest.php on line 25